How to specify a prefix to a service exposed with an ingress - kubernetes

Question

I want exposing various services with a single ingress.
rules:
- http:
paths:
# The path is the URL prefix for the service, e.g. /api/* or just /*
# Note that the service will receive the entire URL with the prefix
- path: /service1/*
backend:
serviceName: service1
servicePort: 5000
- path: /service2/*
backend:
serviceName: service2
servicePort: 5000
The problem is the whole URL including the prefix is passed to the underlying services so all requests return 404 errors: service1 and api don't respond on /service1/some/path but directly on /some/path
How can I specify a prefix to the underlying services?
UPDATE
I tried using rewrite-target as follows. Requests are sent to the rasa-nlu service, but they all trigger 404 because rasa-nlu still gets the /nlu
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress
annotations:
ingress.kubernetes.io/rewrite-target: /
spec:
rules:
- http:
paths:
- path: /nlu
backend:
serviceName: rasa-nlu
servicePort: 5000

Answer 1

This might be what you are looking for;
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
annotations:
ingress.kubernetes.io/rewrite-target: /
name: rewrite
namespace: default
spec:
rules:
- host: rewrite.bar.com
http:
paths:
- backend:
serviceName: echoheaders
servicePort: 80
path: /something
Note the annotation to rewrite-target.
Found this here

Answer 2

This thread might be solved till now, but just for the sake of solution.
below will solve the issue, the default path will be /nlu when it is added to the re-write annotation.
It is from the nginx re-write rule which gets applies to the definition of location directive.
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress
annotations:
ingress.kubernetes.io/rewrite-target: /nlu
spec:
rules:
- http:
paths:
- path: /nlu
backend:
serviceName: rasa-nlu
servicePort: 5000